import logging
import hashlib
import hmac

from pylons import request, response, session, tmpl_context as c, config
from pylons.controllers.util import abort, redirect

from formalchemy import FieldSet

from papyrus.lib.base import BaseController, render
import papyrus.lib.crypt as crypt  # FIXME: Add salt in crypt lib
from papyrus.model import meta, User

log = logging.getLogger(__name__)

# The form schema
user_form = FieldSet(User)
user_form.configure(
    include=[
        user_form.name,
        user_form.email,
        user_form.password.password(),
    ])


class UsersController(BaseController):
    """REST Controller styled on the Atom Publishing Protocol"""
    # To properly map this controller, ensure your config/routing.py
    # file has a resource setup:
    #     map.resource('user', 'users')

    def index(self, format='html'):
        """GET /users: All items in the collection"""
        # url('users')

    def create(self):
        """POST /users: Create a new item"""
        # url('users')
        user = User()
        fs = user_form.bind(user, data=request.POST)
        if fs.validate():
            fs.sync()
            meta.Session.add(user)
            meta.Session.commit()
            c.hash = crypt.encrypt_string(user.email)
            return render('/admin/user/validation_request.mako')

    def new(self, format='html'):
        """GET /users/new: Form to create a new item"""
        # url('new_user')
        c.fs = user_form
        return render('/admin/user/new.mako')

    def update(self, id):
        """PUT /users/id: Update an existing item"""
        # Forms posted to this method should contain a hidden field:
        #    <input type="hidden" name="_method" value="PUT" />
        # Or using helpers:
        #    h.form(url('user', id=ID),
        #           method='put')
        # url('user', id=ID)

    def delete(self, id):
        """DELETE /users/id: Delete an existing item"""
        # Forms posted to this method should contain a hidden field:
        #    <input type="hidden" name="_method" value="DELETE" />
        # Or using helpers:
        #    h.form(url('user', id=ID),
        #           method='delete')
        # url('user', id=ID)

    def show(self, id, format='html'):
        """GET /users/id: Show a specific item"""
        # url('user', id=ID)

    def edit(self, id, format='html'):
        """GET /users/id/edit: Form to edit an existing item"""
        # url('edit_user', id=ID)

    def validate(self, id):
        """Validates a user from the given id hash."""
        email = crypt.decrypt_string(id).decode("utf-8")
        user = meta.Session.query(User).filter_by(email=email).one()
        user.confirmed = True
        meta.Session.commit()
        c.user = user
        return render("/admin/user/validation_success.mako")
